The Nero HTX4150 is a multi-zone amplifier by OSD that delivers OSD publish the full ladder. With ALL FOUR CHANNELS DRIVEN: 75 watts into 8 ohms and 130 watts into 4 ohms at 0.1 percent THD, or 100 and 175 watts at 1 percent. With a single channel driven: 85 and 150 watts at 0.1 percent, or 120 and 200 watts at 1 percent. Bridged, 400 watts into 8 ohms.. It was released in 2022. It is a 4-channel design using a Class AB output stage. The OSD Nero HTX4150 has an MSRP of $763.
Performance Specs
One of the most important factors when deciding on a multi-zone amplifier is its power ratings and compatibility with your speaker's impedance requirements. The OSD Nero HTX4150 is rated at 75 watts RMS into 8-ohms. OSD provides this wattage at a THD (Total Harmonic Distortion) of 0.1% which is an important indicator of distortion at the given values (lower THD is better).
Here are the main highlights of its performance specs:
- 75 watts into 8-ohms (10 Hz-30 kHz) at 0.1%
- 130 watts into 4-ohms
- 105dB Signal to Noise Ratio
How loud will 75 watts actually play in your room? →
When pairing the OSD Nero HTX4150 with a passive Bookshelf (Stand mount) or Passive Floor Standing (Tower) speaker, you have to check if their Max Power Range is below the max wattage of the amp for the given impedance levels.
Operating your amp outside of this max range may damage the speakers.
Inputs and Outputs
Besides the performance specs of the OSD Nero HTX4150, the next important feature set that you have to evaluate is the input and output selections that it offers.
OSD Nero HTX4150 has total of 4 Analog inputs .
Inputs
- Total Number of Analog Inputs: 4
Outputs
Zones and channels
The OSD Nero HTX4150 has
4 amplifier channels, which is
2 stereo zones from one chassis. That is the
number to compare across this category, not the watts: a distribution amplifier is
bought to replace 2 separate stereo amplifiers and the rack
space, mains sockets and cabling that go with them.
Most of these will also run each channel as its own mono zone where a room needs a
single speaker, so the stereo figure above is the conservative reading. As the maker
describes it: Yes (2 zones in one chassis).
What the power figure actually means
OSD Nero HTX4150 is rated
75 watts into 8 ohms with every channel driven at once,
which is 300 watts in total and the strict way to measure a multi-channel amplifier. Most makers of any kind of
multi-channel amplifier publish a figure measured with two channels running and the
rest idle, which flatters a shared power supply. This one does not.
As the manufacturer states it: OSD publish the full ladder. With ALL FOUR CHANNELS DRIVEN: 75 watts into 8 ohms and 130 watts into 4 ohms at 0.1 percent THD, or 100 and 175 watts at 1 percent. With a single channel driven: 85 and 150 watts at 0.1 percent, or 120 and 200 watts at 1 percent. Bridged, 400 watts into 8 ohms.
Feeding it
Sources reach the OSD Nero HTX4150 at line
level: 4 analogue line inputs.
Everything in this category is designed to sit in a rack behind the scenes, so volume
and source selection are normally handled per zone rather than from a front panel.
OSD Nero HTX4150 External Dimensions and Weight
OSD Nero HTX4150 has external dimensions of (H x W x D) 3.46inch x 16.73inch x 15.16inch (87.9mm x 425mm x 385.1mm ). The unit weighs
9.98 kg (22 lbs).
Base Surface Area
Base surface area of an integrated amplifier may become an important decision factor when the space in your room or desk is limited.
The base area of the OSD Nero HTX4150 is approximately 1636.7cm2 / 253.7inch2.
- Width: 425.0mm (16.73")
- Height: 87.9mm (3.46")
- Depth: 385.1mm (15.16")
- Weight: 9.98 kg (22 lbs)
- Base Surface Area: ~1636.7cm2 / 253.7inch2
- Volume: ~14.4 liter / 3.8 gallon
Official Product Page
Official manufacturer's product page for the OSD Nero HTX4150 Integrated Amplifier can be found below:
Official Product Page for OSD Nero HTX4150
Warranty
2 Years of parts warranty and 2 Years of labor warranty is generally provided for the OSD Nero HTX4150 by the manufacturer.
| General |
| Brand |
OSD |
| Full Model Name |
OSD Nero HTX4150 |
| Release Date |
2022 |
| Amplifier Type |
Multi-Zone Amplifier |
| Number of Channels |
4 |
| Amp Class |
Class AB |
| Amplifier Technology |
Solid State |
| Performance |
| Watts RMS per Channel into 8-ohms |
75 watts |
| Watts RMS per Channel into 6-ohms |
N/A |
| Watts RMS per Channel into 4-ohms |
130 watts |
| Frequency Bandwidth |
10 Hz-30 kHz |
| Damping Factor |
90 |
| THD |
0.1% |
| Minimum Impedance |
|
| Signal to Noise Ratio |
105 dB |
| Digital Music |
| Built-in DAC |
No |
| Bluetooth |
No |
| WiFi |
No |
| CONNECTIONS |
| Total Analog Inputs |
4 |
| Phono Input |
No |
| Optical Digital Inputs |
No |
| Coaxial Digital Inputs |
No |
| USB Input |
No |
| Headphone Output |
No |
| Removable Power Cord |
|
| PHYSICAL SPECS |
| Height |
87.9mm (3.46") |
| Width |
425.0mm (16.73") |
| Depth |
385.1mm (15.16") |
| Weight |
9.98 kg (22 lbs) |
| OTHER |
| Parts Warranty |
2 Years |
| Labor Warranty |
2 Years |
How much power does the OSD Nero HTX4150 have?
The OSD Nero HTX4150 delivers OSD publish the full ladder. With ALL FOUR CHANNELS DRIVEN: 75 watts into 8 ohms and 130 watts into 4 ohms at 0.1 percent THD, or 100 and 175 watts at 1 percent. With a single channel driven: 85 and 150 watts at 0.1 percent, or 120 and 200 watts at 1 percent. Bridged, 400 watts into 8 ohms.. Its output almost doubles into 4 ohms, which points to a strong power supply that can hold its composure with demanding, low-impedance speakers.
Does the OSD Nero HTX4150 use vacuum tubes?
No. The OSD Nero HTX4150 is a solid-state amplifier - there are no vacuum tubes in it.
What amplifier class is the OSD Nero HTX4150?
The OSD Nero HTX4150 uses a Class AB amplifier design. Class A/B is the traditional linear design: it runs warmer and is less efficient than Class D, but it is long valued for its natural, low-distortion sound.
Does the OSD Nero HTX4150 have a built-in DAC?
No. The OSD Nero HTX4150 has no built-in DAC, so a digital source such as a streamer or CD transport needs its own converter, or you connect it over analogue.
Can I connect a turntable to the OSD Nero HTX4150?
No. The OSD Nero HTX4150 has no phono input, so a turntable needs an external phono preamp (or a deck with one built in) before it can be connected.
Does the OSD Nero HTX4150 have Bluetooth?
No. The OSD Nero HTX4150 does not have Bluetooth built in; you would need an external Bluetooth receiver connected to one of its inputs.
Does the OSD Nero HTX4150 have a headphone output?
No. The OSD Nero HTX4150 does not have a headphone output, so headphone listening needs a separate headphone amplifier.
How much does the OSD Nero HTX4150 cost?
The OSD Nero HTX4150 has a manufacturer's list price (MSRP) of $763.
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